Telling Kids to Clean Plate May Backfire

MONDAY, April 22 (HealthDay News) -- Although you might think being a member of the "clean plate club" is something that stops when a child is young, new research suggests that up to two-thirds of parents still encourage teenagers to finish all the food on their plates, even if the teen is overweight.

The study found that the use of controlling food behaviors was common in parents of adolescents, with some parents pressuring their kids to eat more and others pressuring their kids to eat less.

Not surprisingly, restrictive behaviors were more common in parents of children who were overweight or obese, while pressure-to-eat behaviors were more common in children who weren't overweight.

"Parents do use high levels of control, such as restriction and pressure to eat," said study author Katie Loth, a registered dietician, doctoral candidate and research assistant at the University of Minnesota in Minneapolis.

"I was surprised at some of the parent behaviors, like feeling that their children should clean their plates and not waste food," Loth said. "In the 1950s, cleaning your plate meant something different. Portion sizes have gotten bigger over time, and if you encourage kids to rely on environmental indicators, like how much food is on their plates or the time of day, they'll lose the ability to rely on internal cues to know whether they're hungry or full."

Results of the study were released online April 22 and will be published in the May print issue of the journal Pediatrics.

As obesity rates among America's adolescents have been rising, researchers have been looking for factors that might be modifiable to help keep teens at a healthy weight. Parental food-related behaviors, whether it's restricting food or encouraging children to eat more, have long been considered a factor in children's weights.

Loth and her colleagues wanted to look at a diverse group of parents and teens to see if parental food behaviors were, in fact, linked to weight status in teens.

Data for the study came from two population-based studies that included parents and teens. One study was conducted in 2010, and the other was done in 2009 to 2010. A total of more than 2,200 teens with an average age of 14.4 were included in the studies, as well as nearly 3,500 parents.